有没有办法抑制键盘哔哔声

我想在我的应用程序中抑制键盘哔哔声，或者至少在特定事件处理程序中抑制键盘哔哔声。这可能吗？

更新

好的，你要求它（代码示例）：

预览键关闭：

    private void textBoxDuckbill_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {
        switch (e.KeyCode) {
            case Keys.Down:
            case Keys.Up:
                e.IsInputKey = true;
                break;
        }
    }

按下键：

    private void textBoxDuckbill_KeyDown(object sender, KeyEventArgs e) {
        TextBox tb = (TextBox)sender;
        if (e.KeyCode.Equals(Keys.Up)) {
            SetFocusOneRowUp(tb.Name);
            e.Handled = true;
            return;
        }
        if (e.KeyCode.Equals(Keys.Down)) {
            SetFocusOneRowDown(tb.Name);
            e.Handled = true;
            return;
        }
        if (e.KeyCode.Equals(Keys.Left)) {
            SetFocusOneColumnBack(tb.Name);
            e.Handled = true;
            return;
        }
        if (e.KeyCode.Equals(Keys.Right)) {
            SetFocusOneColumnForward(tb.Name);
            e.Handled = true;
            return;
        }
    }

按键：

    private void textBoxDuckbill_KeyPress(object sender, KeyPressEventArgs e) {
        TextBox tb = (TextBox)sender;
        errorProviderCRLogins.SetError(tb, String.Empty);
        // If user presses "%" (37) move back/left one TextBox column; 
        // if user presses "'"(39) move forward/right one TextBox column.
        // Also now allowing navigational arrows to do the same thing (KeyDown event)
        if (e.KeyChar == '%') {
            SetFocusOneColumnBack(tb.Name);
            e.Handled = true;
            return;
        }
        if (e.KeyChar == Convert.ToChar(@"'")) {
            SetFocusOneColumnForward(tb.Name);
            e.Handled = true;
            return;
        }
        // Preclude values (1,2,3) that would normally be allowed (see below) but do 
        // not have a value in the corresponding PlatypusID TextBox
        if (((e.KeyChar == '1') && (String.IsNullOrWhiteSpace(textBoxPlatypusNum1.Text))) ||
            ((e.KeyChar == '2') && (String.IsNullOrWhiteSpace(textBoxPlatypusNum2.Text))) ||
            ((e.KeyChar == '3') && (String.IsNullOrWhiteSpace(textBoxPlatypusNum3.Text)))) {
            e.Handled = true;
            return;
        }
        // Now, having gotten to here, we can assume that 1, 2, and 3 are valid (as are
        // Space and Backspace all the time).
        if ((e.KeyChar != '1') &&
            (e.KeyChar != '2') &&
            (e.KeyChar != '3') &&
            (e.KeyChar != (char)Keys.Space) &&
            (e.KeyChar != (char)Keys.Back)) {
            e.Handled = true;
            return;
        }
        // Added Space as an allowable entry so user can delete a val with that key
        // (which will automatically happen on tabbing into the TextBox, as it is
        // now being highlighted)
        if ((e.KeyChar == (char)Keys.Space) || (e.KeyChar == (char)Keys.Back)) {
            tb.Text = String.Empty;
            buttonSave.Enabled = true;
            // Don't return here, as they might continue to hit Space to zero out 
            // subsequent cells
        }
        // Now, if there is already a value in the cell (this is a repeated val, as shown
        // by TextLength being 1 instead of 0), move it to the next cell and give it the 
        // value just entered (even if space for "delete")
        if ((tb.TextLength == 1) || (e.KeyChar == (char)Keys.Space)) {
            buttonSave.Enabled = true;
            MoveToNextCellAndEnterVal(e.KeyChar.ToString(), tb.Name);
        }
        // Although KeyChar has a val such as 49/("1"), TextLength == 0
        if ((e.KeyChar == '1') ||
        (e.KeyChar == '2') ||
            (e.KeyChar == '3')) {
            buttonSave.Enabled = true;
        }
    }

文本更改：

    private void textBoxDuckbill_TextChanged(object sender, EventArgs e) {
        TextBox tb = (TextBox)sender;
        if (tb.Text == "1") {
            tb.BackColor = PlatypusID1_BACKCOLOR;
            tb.ForeColor = PlatypusID1_FORECOLOR;
            return;
        }
        if (tb.Text == "2") {
            tb.BackColor = PlatypusID2_BACKCOLOR;
            tb.ForeColor = PlatypusID2_FORECOLOR;
            return;
        }
        if (tb.Text == "3") {
            tb.BackColor = PlatypusID3_BACKCOLOR;
            tb.ForeColor = PlatypusID3_FORECOLOR;
            return;
        }
        tb.BackColor = System.Drawing.SystemColors.Window;
        tb.ForeColor = System.Drawing.SystemColors.WindowText;
    }
    private void MoveToNextCellAndEnterVal(string APlatypusID, string ATextBoxName) {
        String numericPortionOfTextBoxName = ATextBoxName.Remove(0, LENGTH_OF_TEXT_BOX_BASE);
        String sTextBoxToFind;
        int textBoxNumber = 0;
        int nextTextBoxNumber;
        int.TryParse(numericPortionOfTextBoxName, out textBoxNumber);
        nextTextBoxNumber = ++textBoxNumber;
        // "wrap around"
        if (nextTextBoxNumber > NUMBER_OF_QUARTER_HOURS) {
            nextTextBoxNumber = nextTextBoxNumber - NUMBER_OF_QUARTER_HOURS;
        }
        sTextBoxToFind = String.Format("textBoxDuckbill{0}", nextTextBoxNumber);
        TextBox tb = (TextBox)this.Controls.Find(sTextBoxToFind, true).First();
        tb.Focus();
        tb.Text = APlatypusID;
    }
    private void SetFocusOneRowDown(string ATextBoxName) {
        String numericPortionOfTextBoxName = ATextBoxName.Remove(0, LENGTH_OF_TEXT_BOX_BASE);
        String sTextBoxToFind;
        int textBoxNumber = 0;
        int nextTextBoxNumber;
        int.TryParse(numericPortionOfTextBoxName, out textBoxNumber);
        if (!(textBoxNumber == NUMBER_OF_QUARTER_HOURS)) {
            nextTextBoxNumber = ++textBoxNumber;
        } else {
            nextTextBoxNumber = 1;
        }
        sTextBoxToFind = String.Format("textBoxDuckbill{0}", nextTextBoxNumber);
        TextBox tb = (TextBox)this.Controls.Find(sTextBoxToFind, true).First();
        tb.Focus();
    }